Mathematics (Syllabus D) 4024: Number Topical Past Paper Questions

The population of a town decreases exponentially at a rate of $x\%$ per year. The population of the town on 1 January 2020 was $120\,000$. The population of the town on 1 January 2023 was $102\,885$. **(a)** Find the value of $x$. [3] **(b)** After 1 January 2023 the population o…

**(a)** Anya buys 4 shirts and 3 hats. She pays $100 and receives $21.50 in change. Each shirt costs the same amount. Each hat costs $13.50. Work out the cost of one shirt. [3] **(b)** The exchange rate between dollars ($) and euros (€) is $1 = €0.91. Anya buys a new camera for $…

**(a)** Idris repairs computers. This is how he calculates the charge for a repair. > $56 for the first hour > > Then $12.25 for each additional 15 minutes > **(i)** Work out the amount Idris charges for a repair that takes him 2 hours. [2] > **(ii)** Idris charges $166.25 for an…